计算下列各题.(能简算的要简算)3.6-2.84+7.4-7.2(4-0.2)÷1.9+0.1429×[1-(34-38)]817÷23+123×917.-数学

题目简介

计算下列各题.(能简算的要简算)3.6-2.84+7.4-7.2(4-0.2)÷1.9+0.1429×[1-(34-38)]817÷23+123×917.-数学

题目详情

计算下列各题.(能简算的要简算)
3.6-2.84+7.4-7.2
(4-0.2)÷1.9+0.1
4
29
×[1-(
3
4
-
3
8
)]

8
17
÷23+
1
23
×
9
17
题型:解答题难度:中档来源:不详

答案


(1)3.6-2.84+7.4-7.2,
=(3.6+7.4)-(2.84+7.2),
=11-10.04,
=0.96;

(2)(4-0.2)÷1.9+0.1,
=3.8÷1.9+0.1,
=2+0.1,
=2.1;

(3)class="stub"4
29
×[1-(class="stub"3
4
-class="stub"3
8
)]

=class="stub"4
29
×[1-class="stub"3
8
]

=class="stub"4
29
×class="stub"5
8

=class="stub"5
58


(4)class="stub"8
17
÷23+class="stub"1
23
×class="stub"9
17

=class="stub"8
17
×class="stub"1
23
+class="stub"1
23
×class="stub"9
17

=(class="stub"8
17
+class="stub"9
17
)×class="stub"1
23

=1×class="stub"1
23

=class="stub"1
23

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